CN104104397A - Multi-frequency-band millimeter wave communication transmitter - Google Patents
Multi-frequency-band millimeter wave communication transmitter Download PDFInfo
- Publication number
- CN104104397A CN104104397A CN201410280222.3A CN201410280222A CN104104397A CN 104104397 A CN104104397 A CN 104104397A CN 201410280222 A CN201410280222 A CN 201410280222A CN 104104397 A CN104104397 A CN 104104397A
- Authority
- CN
- China
- Prior art keywords
- frequency
- pass filter
- band pass
- mixer
- multiband
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a multi-frequency-band millimeter wave communication transmitter comprising a multi-frequency-band millimeter wave communication transmitter circuit and a metal shielding box. The transmitter circuit is fixedly assembled in the metal shielding box. The multi-frequency-band millimeter wave communication transmitter comprises a quadruplicated frequency device, a multi-frequency-band band-pass filter, a first driving amplifier, a first frequency mixer, a first band-pass filter, a first power amplifier, a second frequency mixer, a second band-pass filter, a second power amplifier, a second driving amplifier, a third frequency mixer, a third band-pass filter, a third power amplifier, a first antenna, a second antenna and a third antenna. Utilization rate of anti-collision radar infrastructure and frequency spectrum is effectively enhanced, and the number of signal sources and filters is reduced so that manufacturing cost of the millimeter wave communication transmitter is greatly reduced and frequency band selection flexibility and utilization rate are enhanced.
Description
Technical field
The present invention relates to utilize the millimeter wave working frequency range of automobile collision avoidance radar to carry out nearly medium and long distance communication, relate in particular to a kind of multiband millimetre-wave attenuator transmitter.
Background technology
Along with the development of wireless communication technology, technology of Internet of things especially car networking technology and industry, can by mobile communication (GSM, 3G etc.), radio RF recognition technology (RFID), location technology (GPS) etc. to vehicle carry out between the supervision of real-time tracking, operation conditions and vehicle, radio communication between vehicle and various terminal etc.
Meanwhile, the fast development of wireless communication technology consumes the frequency spectrum resource of ghz band fast, is not enough to support the high speed wireless data transmission in car working application.Millimeter-wave frequency is widely used in fields such as ultrahigh speed wireless transmission and safety owing to having wide spectrum, directionality and exempting from the advantages such as license, as the 24GHz for automobile collision avoidance radar field, 60GHz and 77GHz frequency range etc.
Therefore, can utilize the millimeter wave frequency band of automobile collision avoidance radar work to realize in-vehicle wireless communication, realize the multiplexing of infrastructure and frequency spectrum resource in automobile collision avoidance radar, and can be by the large grid of application extension radio communication and information exchange between car and car, Che Yulu, car and pedestrian, car and the Internet, realize the integrated network of intelligent transportation manage, Intelligent Dynamic information service and Vehicular intelligent control, thereby realize the further application in field of transportation system of radio communication, technology of Internet of things.
Meanwhile, if the groundwork frequency range of automobile collision avoidance radar (24GHz, 60GHz, 77GHz) is combined, can realize a kind of multiband communication system, be formed by multiband communication transmitter and multiband communication control processor.This multiband communication system combines the advantage of three frequency ranges, possesses the feature of nearly medium and long distance communication.
Summary of the invention
The object of the invention is to utilize the millimeter wave frequency band of automobile collision avoidance radar work to carry out nearly medium and long distance communication, and propose a kind of multiband millimetre-wave attenuator transmitter.
The present invention is for solving the problems of the technologies described above adopted scheme:
A kind of multiband millimetre-wave attenuator transmitter, comprises multiband millimetre-wave attenuator transmitter circuitry and metal shielding box; The assembling of multiband millimetre-wave attenuator transmitter circuitry is fixed in metal shielding box;
Described multiband borne Millimeter Wave Collision Avoidance Radars transmitter circuitry comprises quadrupler, multiband band pass filter, the first driving amplifier, the first frequency mixer, the first band pass filter, the first power amplifier, the second frequency mixer, the second band pass filter, the second power amplifier, the second driving amplifier, three-mixer, the 3rd band pass filter, the 3rd power amplifier, the first antenna, the second antenna, third antenna.
Quadrupler connects a microwave signal source by microwave connector, output is connected with the input of multiband band pass filter, the first frequency range output of multiband band pass filter is connected with the input of the first driving amplifier, the output of the first driving amplifier is connected with the local oscillation signal end of the first frequency mixer, the intermediate frequency port of the first frequency mixer connects the first intermediate-freuqncy signal source by microwave connector, the prevention at radio-frequency port of the first frequency mixer is connected with first band pass filter one end, the first band pass filter other end is connected with the input of the first power amplifier, the output of the first power amplifier connects the first antenna by the first millimeter-wave signal interface, the second frequency range output of multiband band pass filter is connected with the local oscillation signal end of the second frequency mixer, the intermediate frequency port of the second frequency mixer connects the second intermediate-freuqncy signal source by microwave connector, the prevention at radio-frequency port of the second frequency mixer is connected with one end of the second band pass filter, the other end of the second band pass filter is connected with the input of the second power amplifier, and the output of the second power amplifier connects the second antenna by the second millimeter-wave signal interface, the 3rd frequency range output of multiband band pass filter is connected with the input of the second driving amplifier, the output of the second driving amplifier is connected with the local oscillation signal end of three-mixer, the intermediate frequency port of three-mixer connects the 3rd intermediate-freuqncy signal source by microwave connector, the radio-frequency head of three-mixer is connected with one end of the 3rd band pass filter, the 3rd band pass filter other end is connected with the 3rd power amplifier, and the output of the 3rd power amplifier connects third antenna by the 3rd millimeter-wave signal interface.
Described frequency multiplier adopts quadruple monolithic integrated circuit, realizes the quadruple of signal source.
Described the first band pass filter, the second band pass filter are identical with the 3rd bandpass filter structures, and it is the microstrip coupled structure of zigzag, comprise two 50 ohm microstrip, six roots of sensation parallel coupled line and five coupling line connecting lines;
Six roots of sensation parallel coupled line indentation is arranged, and by the line serial connection that is of coupled connections, wherein first is connected with 50 ohm microstrip respectively by transition line with last root parallel coupled line.
The first described frequency mixer adopts fundamental wave mixing device, for the first frequency band signals and the first intermediate-freuqncy signal are carried out to first-harmonic uppermixing; The second frequency mixer and three-mixer adopt Subharmonic mixer, the second frequency mixer is for the second frequency band signals and the second intermediate-freuqncy signal are carried out to second harmonic uppermixing, and three-mixer is for carrying out second harmonic uppermixing by the 3rd frequency band signals and the 3rd intermediate-freuqncy signal.
Described microwave connector adopts SMA connector; The first millimeter-wave signal interface adopts 2.92mm coaxial connector or the micro-band-waveguide connector of WR28, the second millimeter-wave signal interface adopts 1.85mm coaxial connector or the micro-band-waveguide connector of WR15, and the 3rd millimeter-wave signal interface adopts 1mm coaxial connector or the micro-band-waveguide connector of WR10.
Described metal shielding box is processed by brass.
The present invention contrasts prior art and has following innovative point:
1, multiband millimetre-wave attenuator transmitter of the present invention has utilized the working frequency range of automobile collision avoidance radar to realize vehicle-mounted nearly medium and long distance radio communication, effectively raises the utilance of anticollision radar infrastructure and frequency spectrum.
2, multiband millimetre-wave attenuator transmitter of the present invention adopts signal source shared mode, has effectively reduced the quantity of signal source and filter, thereby the cost of manufacture of this millimetre-wave attenuator transmitter is significantly reduced.
3, multiband millimetre-wave attenuator transmitter of the present invention can make full use of the harmonic wave producing after quadruple.The communication transmitter of tradition frequency multiplication framework only utilizes the main frequency after frequency multiplication, i.e. a frequency, filtering all the other unwanted harmonic waves.The present invention carries out frequency multiplication Hou tri-road signals power amplification simultaneously and carries out launching after mixing, not only improve the utilance of frequency range, and can produce three frequency band signals for communication simultaneously, also can select and arrange in pairs or groups according to the difference of application band and transmitting range, improve selection flexibility and the utilance of frequency range.
4, multiband millimetre-wave radar transmitter of the present invention adopts integrated development theory, and multiband millimetre-wave attenuator transmitter circuitry is positioned in metal shielding box, has improved antijamming capability and the dust tightness of circuit.
Brief description of the drawings
Fig. 1 is multiband millimetre-wave attenuator transmitter circuitry block diagram of the present invention;
Fig. 2 is toothed belt bandpass filter structure chart of the present invention;
Embodiment
For making object of the present invention, technical scheme and advantage are more clear to be understood, below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, a kind of multiband millimetre-wave attenuator transmitter, relates generally to multiband millimetre-wave attenuator transmitter circuitry; The assembling of multiband millimetre-wave attenuator transmitter circuitry is fixed on metal shielding box.
Described multiband millimetre-wave attenuator transmitter circuitry comprises quadrupler 2, multiband band pass filter 3, the first driving amplifier 4, the first frequency mixer 5, the first band pass filter 7, the first power amplifier 8, the second frequency mixer 10, the second band pass filter 12, the second power amplifier 13, the second driving amplifier 15, three-mixer 16, the 3rd band pass filter 18, the 3rd power amplifier 19, the first antenna 9, the second antenna 14 and third antenna 20.
Quadrupler 2 connects first signal source 1 by microwave connector, output is connected with the input of multiband band pass filter 3, the first frequency range output of multiband band pass filter 3 is connected with the input of the first driving amplifier 4, the output of the first driving amplifier 4 is connected with the local oscillation signal end of the first frequency mixer 5, the intermediate frequency port of the first frequency mixer connects the first intermediate-freuqncy signal source 6 by microwave connector, the prevention at radio-frequency port of the first frequency mixer 5 is connected with first band pass filter 7 one end, first band pass filter 7 other ends are connected with the input of the first power amplifier 8, the output of the first power amplifier 8 connects the first antenna 9 by the first millimeter-wave signal interface, the second frequency range output of multiband band pass filter 3 is connected with the local oscillation signal end of the second frequency mixer 10, the intermediate frequency port of the second frequency mixer 10 connects the second intermediate-freuqncy signal source 11 by microwave connector, the prevention at radio-frequency port of the second frequency mixer is connected with one end of the second band pass filter 12, the other end of the second band pass filter 12 is connected with the input of the second power amplifier 13, and the output of the second power amplifier 13 connects the second antenna 14 by the second millimeter-wave signal interface, the 3rd frequency range output of multiband band pass filter 3 is connected with the input of the second driving amplifier 15, the output of the second driving amplifier is connected with the local oscillation signal end of three-mixer 16, the intermediate frequency port of three-mixer 16 connects the 3rd intermediate-freuqncy signal source 17 by microwave connector, the radio-frequency head of three-mixer 16 is connected with one end of the 3rd band pass filter 18, the 3rd band pass filter other end is connected with the 3rd power amplifier 19, and the output of the 3rd power amplifier 19 connects third antenna 20 by the 3rd millimeter-wave signal interface,
As shown in Figure 2, the first described band pass filter is identical with the second bandpass filter structures, and it is the microstrip coupled structure of zigzag, comprises two 50 ohm microstrip, six roots of sensation parallel coupled line and five coupling line connecting lines;
Six roots of sensation parallel coupled line indentation is arranged, and by the line serial connection that is of coupled connections, wherein first is connected with 50 ohm microstrip respectively by transition line with last root parallel coupled line;
Described frequency multiplier adopts quadruple monolithic integrated circuit, realizes the quadruple of signal source, solves existing local oscillated signal and leaks into antenna to reduce the frequency of required local oscillation signal, i.e. the problem of radio-frequency transmissions end, puies forward high-frequency stability.After frequency multiplication, each harmonic is utilized after can amplifying after filtering again.
The first described frequency mixer adopts fundamental wave mixing device, for the first frequency band signals and the first intermediate-freuqncy signal are carried out to first-harmonic uppermixing; The second frequency mixer and three-mixer adopt Subharmonic mixer, the second frequency mixer is for the second frequency band signals and the second intermediate-freuqncy signal are carried out to second harmonic uppermixing, and three-mixer is for carrying out second harmonic uppermixing by the 3rd frequency band signals and the 3rd intermediate-freuqncy signal.
Described microwave connector adopts SMA connector; The first millimeter-wave signal interface adopts 2.92mm coaxial connector or the micro-band-waveguide connector of WR28, the second millimeter-wave signal interface adopts 1.85mm coaxial connector or the micro-band-waveguide connector of WR15, and the 3rd millimeter-wave signal interface adopts 1mm coaxial connector or the micro-band-waveguide connector of WR10; Power connection adopts feedthrough capacitor.
Taking 24GHz, 61GHz, present invention is described as example for 77GHz tri-frequency range millimetre-wave attenuator transmitters.
Signal source 1 adopts the sinusoidal signal of 7.6GHz, after frequency multiplier 2 quadruples, obtains the each harmonic of 7.6GHz.Multiband band pass filter 3 is separated into the signal after quadruple the signal of three road different frequency ranges, and frequency is respectively 22.8GHz, 30.4GHz, 38GHz, i.e. the frequency tripling of 7.6GHz, quadruple, five frequencys multiplication.Due to quadrupler produce signal in except four times of signals each harmonic output power all very little, so the first frequency band signals, be that 22.8GHz signal carries out first-harmonic uppermixing with 1.2GHz the first intermediate-freuqncy signal 6 after the first driving amplifier 4 improves signal power in the first frequency mixer 5, the 24GHz signal producing is through centre frequency 24GHz, the first band pass filter 7 filtering of bandwidth 2GHz, are launched by the first antenna 9 after finally improving transmitting power by the first power amplifier 8; The second frequency band signals, be that 30.4GHz signal carries out second harmonic uppermixing with 200MHz the second intermediate-freuqncy signal 11 in the second frequency mixer 10, produce 61GHz signal through centre frequency 61GHz, the second band pass filter 12 filtering of bandwidth 2GHz, are launched by the second antenna 14 after finally improving transmitting power by the second power amplifier 13; The 3rd frequency band signals, be that 38GHz signal carries out second harmonic uppermixing with 1GHz the 3rd intermediate-freuqncy signal 17 after the second driving amplifier 15 amplifying signals in three-mixer 16, produce 77GHZ signal through centre frequency 77GHz, the 3rd band pass filter 18 filtering of bandwidth 2GHz, are launched by third antenna 20 after finally improving transmitting power by the 3rd power amplifier 19.Three road signals are launched simultaneously, so can select and arrange in pairs or groups according to the transmitting range of corresponding application band and desired signal.
Herein, the first intermediate-freuqncy signal, the second intermediate-freuqncy signal and the 3rd intermediate-freuqncy signal are respectively 1.2GHz, 0.2GHz, 1GHz, also can be set to other operating frequency, and other parts of the crashproof communication transmitter circuit of millimeter wave adjust accordingly.
Frequency multiplier 2 in embodiment adopts the monolithic quadruple chip of UMS company, and incoming frequency scope is 6.25-8.25GHz, and after quadruple, reference frequency output is 25-33GHz.When input signal adopts 7.6GHz, when power 12dBm signal, output can obtain a 30.4GHz, the signal of power 11dBm.
The first frequency mixer 5 in embodiment adopts the passive GaAs frequency mixer of Hittite company, this frequency mixer can up-conversion also can down-conversion, local oscillation signal operating frequency 14-26GHz, the conversion loss of 7.5dB; The second frequency mixer 10 adopts the GaAs single sideband mixer of UMS company, and this frequency mixer has mirror image inhibition, subharmonic mixing, up-conversion and frequency down-conversion function, local oscillation signal operating frequency 27.5-32.5GHz, the conversion loss of 12dB, the Image-rejection ration of 10dBc; Three-mixer 16 adopts the passive Subharmonic mixer of Hittite company, this frequency mixer can up-conversion also can down-conversion, local oscillation signal operating frequency 29-43GHz, the conversion loss of 11dB.
The first band pass filter 7, the second band pass filter 12 and the 3rd band pass filter 18 in embodiment adopt the microstrip coupled structure of zigzag as shown in Figure 2.This structure full symmetric, has function admirable, and area is little, and input and output, in the advantage of same level line, make the interconnection between band pass filter and chip more stable and convenient.The first band pass filter 7 is operated in 24GHz, and bandwidth 2GHz, for extracting the signal of 24GHz, filtering each harmonic and clutter; The second band pass filter 12 is operated in 61GHz, and bandwidth 2GHz, for extracting the signal of 61GHz, filtering each harmonic and clutter; The 3rd band pass filter 18 is operated in 77GHz, bandwidth 2GHz, and for extracting 77GHz signal, the unwanted each harmonic of filtering and clutter.Multiband band pass filter 3, for extracting frequency tripling, quadruple, five frequency-doubled signals, offers late-class circuit and uses.Above band pass filter all utilizes Advanced Design System and HFSS to carry out electromagnetic-field simulation to approach actual performance.
In embodiment, the first driving amplifier 4, the first power amplifier 8 and the second driving amplifier 15 adopt the level Four GaAs power amplifier chip of UMS company, this level Four power amplifier operating frequency is at 20-40GHz, gain 22dB, saturation output power 20dBm, there is very good input Broadband Matching, for improving the transmitting power of three times of signals after frequency multiplication, five times of signal powers and first via radiofrequency signal.The second power amplifier 13 adopts the level Four GaAs power amplifier of Hittite company, this power amplifier working frequency range 50-66GHz, and gain 24dB, output 1dB compression horsepower 17dBm, for improving the transmitting power of the second tunnel radiofrequency signal.The 3rd power amplifier 19 adopts the level Four GaAs power amplifier of Hittite company, and this level Four power amplifier is operated in 71-86GHz, gain 15dB, and output 1dB compression horsepower 15dBm, for improving the transmitting power of Third Road radiofrequency signal.
Upper content is the detailed description of the present invention being done in conjunction with concrete case study on implementation, can not assert that the concrete enforcement of the present invention only limits to these explanations.For those skilled in the art of the present invention; without departing from the inventive concept of the premise; to each building block of the present invention, position relationship and connected mode, in the situation that not changing its function, the equivalent transformation carrying out or alternative, also falls into protection scope of the present invention.
The undocumented technology of the present invention belongs to techniques well known.
Claims (6)
1. a multiband millimetre-wave attenuator transmitter, comprises multiband millimetre-wave attenuator transmitter circuitry and metal shielding box; The assembling of multiband millimetre-wave attenuator transmitter circuitry is fixed in metal shielding box;
It is characterized in that: described multiband millimetre-wave attenuator transmitter comprises quadrupler, multiband band pass filter, the first driving amplifier, the first frequency mixer, the first band pass filter, the first power amplifier, the second frequency mixer, the second band pass filter, the second power amplifier, the second driving amplifier, three-mixer, the 3rd band pass filter, the 3rd power amplifier, the first antenna, the second antenna, third antenna;
Quadrupler connects a microwave signal source by microwave connector, output is connected with the input of multiband band pass filter, the first frequency range output of multiband band pass filter is connected with the input of the first driving amplifier, the output of the first driving amplifier is connected with the local oscillation signal end of the first frequency mixer, the intermediate frequency port of the first frequency mixer connects the first intermediate-freuqncy signal source by microwave connector, the prevention at radio-frequency port of the first frequency mixer is connected with first band pass filter one end, the first band pass filter other end is connected with the input of the first power amplifier, the output of the first power amplifier connects the first antenna by the first millimeter-wave signal interface, the second frequency range output of multiband band pass filter is connected with the local oscillation signal end of the second frequency mixer, the intermediate frequency port of the second frequency mixer connects the second intermediate-freuqncy signal source by microwave connector, the prevention at radio-frequency port of the second frequency mixer is connected with one end of the second band pass filter, the other end of the second band pass filter is connected with the input of the second power amplifier, and the output of the second power amplifier connects the second antenna by the second millimeter-wave signal interface, the 3rd frequency range output of multiband band pass filter is connected with the input of the second driving amplifier, the output of the second driving amplifier is connected with the local oscillation signal end of three-mixer, the intermediate frequency port of three-mixer connects the 3rd intermediate-freuqncy signal source by microwave connector, the radio-frequency head of three-mixer is connected with one end of the 3rd band pass filter, the 3rd band pass filter other end is connected with the 3rd power amplifier, and the output of the 3rd power amplifier connects third antenna by the 3rd millimeter-wave signal interface.
2. a kind of multiband millimetre-wave attenuator transmitter according to claim 1, is characterized in that: described frequency multiplier adopts quadruple monolithic integrated circuit, realizes the quadruple of signal source.
3. a kind of multiband millimetre-wave attenuator transmitter according to claim 1, it is characterized in that: described the first band pass filter, the second band pass filter are identical with the 3rd bandpass filter structures, it is the microstrip coupled structure of zigzag, comprises two 50 ohm microstrip, six roots of sensation parallel coupled line and five coupling line connecting lines;
Six roots of sensation parallel coupled line indentation is arranged, and by the line serial connection that is of coupled connections, wherein first is connected with 50 ohm microstrip respectively by transition line with last root parallel coupled line.
4. a kind of multiband millimetre-wave attenuator transmitter according to claim 1, is characterized in that: the first described frequency mixer adopts fundamental wave mixing device, for the first frequency band signals and the first intermediate-freuqncy signal are carried out to first-harmonic uppermixing; The second frequency mixer and three-mixer adopt Subharmonic mixer, the second frequency mixer is for the second frequency band signals and the second intermediate-freuqncy signal are carried out to second harmonic uppermixing, and three-mixer is for carrying out second harmonic uppermixing by the 3rd frequency band signals and the 3rd intermediate-freuqncy signal.
5. a kind of multiband millimetre-wave attenuator transmitter according to claim 1, is characterized in that: described microwave connector adopts SMA coaxial connector; The first millimeter-wave signal interface adopts 2.92mm coaxial connector or the micro-band-waveguide connector of WR28, the second millimeter-wave signal interface adopts 1.85mm coaxial connector or the micro-band-waveguide connector of WR15, and the 3rd millimeter-wave signal interface adopts 1mm coaxial connector or the micro-band-waveguide connector of WR10.
6. a kind of multiband millimetre-wave attenuator transmitter according to claim 1, is characterized in that: described metal shielding box is processed by brass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410280222.3A CN104104397B (en) | 2014-06-20 | 2014-06-20 | Multi-frequency-band millimeter wave communication transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410280222.3A CN104104397B (en) | 2014-06-20 | 2014-06-20 | Multi-frequency-band millimeter wave communication transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104104397A true CN104104397A (en) | 2014-10-15 |
| CN104104397B CN104104397B (en) | 2017-01-18 |
Family
ID=51672241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410280222.3A Active CN104104397B (en) | 2014-06-20 | 2014-06-20 | Multi-frequency-band millimeter wave communication transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104104397B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391458A (en) * | 2015-11-27 | 2016-03-09 | 兰州交通大学 | Multi-frequency-band transmitter used for direct communication between trains |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050021201A1 (en) * | 2001-07-17 | 2005-01-27 | Albrecht Klotz | Method and device for data exchange and processing |
| CN102076120A (en) * | 2010-12-03 | 2011-05-25 | 东南大学 | Multimode multiband radio-frequency onboard micro-micro cellular communication system based on software defined radio |
| CN102870333A (en) * | 2010-02-24 | 2013-01-09 | 华为技术有限公司 | Rejection of RF interferers and noise in a wireless communications transceiver |
| CN204103901U (en) * | 2014-06-20 | 2015-01-14 | 杭州电子科技大学 | Multiband millimetre-wave attenuator transmitter |
-
2014
- 2014-06-20 CN CN201410280222.3A patent/CN104104397B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050021201A1 (en) * | 2001-07-17 | 2005-01-27 | Albrecht Klotz | Method and device for data exchange and processing |
| CN102870333A (en) * | 2010-02-24 | 2013-01-09 | 华为技术有限公司 | Rejection of RF interferers and noise in a wireless communications transceiver |
| CN102076120A (en) * | 2010-12-03 | 2011-05-25 | 东南大学 | Multimode multiband radio-frequency onboard micro-micro cellular communication system based on software defined radio |
| CN204103901U (en) * | 2014-06-20 | 2015-01-14 | 杭州电子科技大学 | Multiband millimetre-wave attenuator transmitter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391458A (en) * | 2015-11-27 | 2016-03-09 | 兰州交通大学 | Multi-frequency-band transmitter used for direct communication between trains |
| CN105391458B (en) * | 2015-11-27 | 2018-02-09 | 兰州交通大学 | Multiband emitter for direct communication between train |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104104397B (en) | 2017-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104101867B (en) | Multi band millimeter wave anticollision radar signal source | |
| CN104166124B (en) | A kind of multiband borne Millimeter Wave Collision Avoidance Radars receiver | |
| CN103647575B (en) | 2-12GHz broadband microwave front-end circuit and 2-12GHz microwave signal receiving method | |
| CN108226914A (en) | A kind of millimetre-wave attenuator and radar integrated radio-frequency Front-end Design method | |
| CN202121073U (en) | Ku wave band miniaturized active phased array antenna system based on vector modulation | |
| CN102420625A (en) | Matching circuit, matching circuit network and signal transmit-receive device | |
| CN104009765A (en) | High-performance radio frequency transmitter of LTE channel simulator | |
| CN204103901U (en) | Multiband millimetre-wave attenuator transmitter | |
| CN105375936A (en) | Mobile communication terminal common antenna circuit | |
| CN102970054A (en) | Open type software radio platform method, device and system | |
| CN207882439U (en) | Automobile active anticollision millimetre-wave radar system | |
| CN108551349A (en) | A kind of multiband millimeter-wave transmitter | |
| CN203930049U (en) | Multiband borne Millimeter Wave Collision Avoidance Radars receiver | |
| CN105552486A (en) | Millimeter wave narrow bandpass filter based on folded substrate integrated waveguide | |
| CN104104397B (en) | Multi-frequency-band millimeter wave communication transmitter | |
| CN107222221A (en) | A kind of radio circuit and electronic equipment | |
| CN203747755U (en) | Millimeter-wave down-conversion assembly | |
| CN203377868U (en) | Low power consumption radio frequency emission circuit device | |
| CN203930048U (en) | Multiband borne Millimeter Wave Collision Avoidance Radars signal source | |
| CN108055057A (en) | A kind of two waveband active-passive composite TR components | |
| CN111800157A (en) | Detection component radio frequency front end circuit | |
| CN112217535A (en) | Multi-mode radio frequency front-end integrated chip and working method | |
| CN206922743U (en) | Integrated Ka wave band antennas front end | |
| CN202602626U (en) | Open-type software radio platform | |
| Zaidel et al. | 5G Coupler Design for Intelligent Transportation System (ITS) Application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |